Ars Technica is running an interesting article about the Mail application on Windows 8. It's one of the first party Metro applications, and Ars' conclusion is that it's really, really not up to snuff - it can't even compare favourably to the mail application on Windows Phone. The sad thing is, however - this applies to virtually all Metro applications.

You also have a completely redesigned UI that is NOT friendly to keyboard and mouse operation. (just try "swiping" with a mouse! It's ridiculous!)

Actually the Windows 8 UI is much friendlier to keyboard users than it is to mouse users.

Need the Charms via the keyboard? Press WindowsKey+C and they are immediately there -- you even have some hotkeys to jump to specific charms. Need to close an app via the keyboard? Press ALT+F4 and kiss it goodbye.

Need the Charms via the mouse? You have to hover on the right edge of the screen and wait for the darn things to appear. Need to close an application via the mouse? Move to the top edge of the screen and drag a non-existent border down. Seriously, Metro is like hell for a mouse user. Most of the time you'll be waiting for stuff keyboard and touchscreen users can access immediately.

The sad thing is Microsoft is proving us right. All of us who said Metro was a crappy tabletized environment that could not handle serious tasks and as meant for Twitter posters and weather checkers... Well, not even Microsoft could make their serious programs (Office, Registry Editor, Windows Explorer, etc.) as fully-featured Metro applications, which is why we are constantly jumping back and forth from Metro to Desktop and back to Metro.